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High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid

Due to their low damage tolerance, engineering ceramic foams are often limited to non-structural usages. In this work, we report that stereom, a bioceramic cellular solid (relative density, 0.2–0.4) commonly found in the mineralized skeletal elements of echinoderms (e.g., sea urchin spines), achieve...

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Autores principales: Yang, Ting, Jia, Zian, Wu, Ziling, Chen, Hongshun, Deng, Zhifei, Chen, Liuni, Zhu, Yunhui, Li, Ling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9568512/
https://www.ncbi.nlm.nih.gov/pubmed/36241635
http://dx.doi.org/10.1038/s41467-022-33712-z
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author Yang, Ting
Jia, Zian
Wu, Ziling
Chen, Hongshun
Deng, Zhifei
Chen, Liuni
Zhu, Yunhui
Li, Ling
author_facet Yang, Ting
Jia, Zian
Wu, Ziling
Chen, Hongshun
Deng, Zhifei
Chen, Liuni
Zhu, Yunhui
Li, Ling
author_sort Yang, Ting
collection PubMed
description Due to their low damage tolerance, engineering ceramic foams are often limited to non-structural usages. In this work, we report that stereom, a bioceramic cellular solid (relative density, 0.2–0.4) commonly found in the mineralized skeletal elements of echinoderms (e.g., sea urchin spines), achieves simultaneous high relative strength which approaches the Suquet bound and remarkable energy absorption capability (ca. 17.7 kJ kg(−1)) through its unique bicontinuous open-cell foam-like microstructure. The high strength is due to the ultra-low stress concentrations within the stereom during loading, resulted from their defect-free cellular morphologies with near-constant surface mean curvatures and negative Gaussian curvatures. Furthermore, the combination of bending-induced microfracture of branches and subsequent local jamming of fractured fragments facilitated by small throat openings in stereom leads to the progressive formation and growth of damage bands with significant microscopic densification of fragments, and consequently, contributes to stereom’s exceptionally high damage tolerance.
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spelling pubmed-95685122022-10-16 High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid Yang, Ting Jia, Zian Wu, Ziling Chen, Hongshun Deng, Zhifei Chen, Liuni Zhu, Yunhui Li, Ling Nat Commun Article Due to their low damage tolerance, engineering ceramic foams are often limited to non-structural usages. In this work, we report that stereom, a bioceramic cellular solid (relative density, 0.2–0.4) commonly found in the mineralized skeletal elements of echinoderms (e.g., sea urchin spines), achieves simultaneous high relative strength which approaches the Suquet bound and remarkable energy absorption capability (ca. 17.7 kJ kg(−1)) through its unique bicontinuous open-cell foam-like microstructure. The high strength is due to the ultra-low stress concentrations within the stereom during loading, resulted from their defect-free cellular morphologies with near-constant surface mean curvatures and negative Gaussian curvatures. Furthermore, the combination of bending-induced microfracture of branches and subsequent local jamming of fractured fragments facilitated by small throat openings in stereom leads to the progressive formation and growth of damage bands with significant microscopic densification of fragments, and consequently, contributes to stereom’s exceptionally high damage tolerance. Nature Publishing Group UK 2022-10-14 /pmc/articles/PMC9568512/ /pubmed/36241635 http://dx.doi.org/10.1038/s41467-022-33712-z Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Yang, Ting
Jia, Zian
Wu, Ziling
Chen, Hongshun
Deng, Zhifei
Chen, Liuni
Zhu, Yunhui
Li, Ling
High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title_full High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title_fullStr High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title_full_unstemmed High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title_short High strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
title_sort high strength and damage-tolerance in echinoderm stereom as a natural bicontinuous ceramic cellular solid
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9568512/
https://www.ncbi.nlm.nih.gov/pubmed/36241635
http://dx.doi.org/10.1038/s41467-022-33712-z
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